Botanical Name: Trifolium incarnatum
Days to Maturity: 70–90 days
Native: Europe, Turkey, Madeira Islands
Hardiness: Frost-tolerant annual. Hardy to -10°F.
Plant Dimensions: 12″–36″ tall, 8″–12″ wide
Variety Information: Upright plant with a taproot, typical 3-leaflet clover leaf and elongated, 1″-long flower heads with crimson flowers that open in succession from bottom to top. Crimson clover grows best in cool weather. In areas with cold winters it is sown in spring or in fall. In warmers areas (USDA zones 6 and warmer), it is grown as a winter annual for flowering the following spring. Flowers are produced only under long-day conditions (more than 12 hours of daylight).
Exposure: Full sun to part shade
When to Sow Outside: Cold Climates: 2 to 4 weeks before your average last spring frost or in late summer, 2 to 3 months before your average first frost date. Mild climates (USDA zones 6 and warmer) and to overwinter: 6 to 8 weeks before your average first fall frost date.
When to Start Inside: Not applicable.
Days to Emerge: 7–21 days
Seed Depth: ¼”
Seed Spacing: Scatter seed about 2″ apart
Thinning: Not applicable